字面意义是忽略序列化，就是当字段在序列化时，被[JsonIgnore]标记了的字段将被忽略序列化
序列化输出中使用Id和Name属性,但我绝对不会对AlternateName和Color感兴趣.我用[JsonIgnore]标记了那些.我希望描述出现,但有时这可能会变得很长,所以我使用自定义JsonConverter来限制它的长度.我还想使用较短的属性名称来描述,所以我用[JsonProperty(“Desc”)]标记了它.
class Foo
{
public int Id { get; set; }
public string Name { get; set; }
[JsonIgnore]
public string AlternateName { get; set; }
[JsonProperty("Desc")]//替换序列化名
[JsonConverter(typeof(StringTruncatingConverter))]
public string Description { get; set; }
[JsonIgnore]
public string Color { get; set; }
}
当我序列化上面的一个实例时……
Foo foo = new Foo
{
Id = 1,
Name = "Thing 1",
AlternateName = "The First Thing",
Description = "This is some lengthy text describing Thing 1 which you'll no doubt find very interesting and useful.",
Color = "Yellow"
}; string json = JsonConvert.SerializeObject(foo, Formatting.Indented);
…我得到这个输出：
{
"Id": 1,
"Name": "Thing 1",
"Desc": "This is some lengthy text describing Thing 1 "
}
我有时想获得完整的JSON输出,忽略我的自定义.我可以使用自定义ContractResolver以编程方式“取消应用”类中的属性.这是解析器的代码：
class IgnoreJsonAttributesResolver : DefaultContractResolver
{
protected override IList<JsonProperty> CreateProperties(Type type, MemberSerialization memberSerialization)
{
IList<JsonProperty> props = base.CreateProperties(type, memberSerialization);
foreach (var prop in props)
{
prop.Ignored = false; // Ignore [JsonIgnore]
prop.Converter = null; // Ignore [JsonConverter]
prop.PropertyName = prop.UnderlyingName; // restore original property name
}
return props;
}
}
要使用解析器,我将它添加到JsonSerializerSettings并将设置传递给序列化器,如下所示：
JsonSerializerSettings settings = new JsonSerializerSettings();
settings.ContractResolver = new IgnoreJsonAttributesResolver();
settings.Formatting = Formatting.Indented; string json = JsonConvert.SerializeObject(foo, settings);
输出现在包括被忽略的属性,并且描述不再被截断：
{
"Id": 1,
"Name": "Thing 1",
"AlternateName": "The First Thing",
"Description": "This is some lengthy text describing Thing 1 which you'll no doubt find very interesting and useful.",
"Color": "Yellow"
}
原文：http://www.voidcn.com/article/p-uvkjwmre-bub.html